Combined feeding and cold drawing mechanism for heading machines and the like



3' Sheets-Sheet l R mi .m u. wn l m r -3 e .nl nl B f1@ e lJIJ-.-1111/4-111 l e L 711% r. li

Jan. 14, 1941.

N CDNDINED FEEDING AND coLD DRAWING MEcHANIsN FOR HEADING MACHINES ANDTHE LIKE L. BERKEBII'.v

original Filed Jun'e 27,1958

Jan- 1.4, 1941- LBERKEBN. '2,228,748

COMBINED FEED'ING' AND oLDDRAwmG MECHANISM Fon HEADING MACHINES lAND THELIKE Originl Fil-ed June 27, 19258 3 Sheets-Sheet 2 2:7. Y y INVENTORLee Berk/617,

ATTORNEYS K D )during the forward movement of the head N the rearward,thereby wedging' the same vto tightlyresistance or loadr will tend todraw the jaws grip 'the stock.` .;.Qn--the other hand, when the theforward endsof. the jaws-will` hold the same in frictional engagementwith; thestock.' A spline'. *N'I extending vertically and engagingspline ways l in the jaws N4 hold the'same in algnmentwhile.;

Q3. aridlQ5-together with their shafts Q and Q* permitting movementtoward or from each other.

. There are also bushings Na and N9 in the sliding head N for guidingthenstocis passing therethrough.

thereof. This die member, as shown in Figure 8,

4is mounted to permit a slightflongtudinal move- ,meri t".tl`1`ereofagainst frictional resisimncei,r `For "this ypurpose the die. isysurrounded by`an annu.-v lar `niemb`r1 '0 .which` is xed in thev'forward wall of the section LfffAlfriction shoe O3 `.extending throughav recess `in the annular Vme'mbei-LO' bears against the dieO, and aspring@4 f places atensiori on the shoe. This tension may penned byanzaujusnng scrragfo=i .whih'bars againstthefollower O? .forming an.abutment for spring.; To the sliding movement Sof thefdiefwithili theannual member O screws "O". extend through threadedfapertures in therear wau o8 o fftiie section L into proximity to the die, andthesescrewsmay be i adjusted to "obtainthe desiredamount of movement.

'.fThe feeder N being forward of the die O,l it

obvious that some additional means must be Ylio lprovidedto advance. theforward endv of 'the stock `through thefdie before it cany be engaged bysaid`feeder. For this pur'pose I` have provided i a, second. feederPfwhichds substantially .the

L sa'nie in .constructionfas the feederv N ,and, therefore, .will notbedeseribed in detail. l This second rfeeder-is actuated by the feeder N.through vthe medium ofv rods P.4 Theforwardends ofthesekrods.,threade'cily',.engage the head1 N and extend rearwardvtherefromfthro'ughlapertures in the IwalisQOfand 0k in to-the scti on L2-of the frame L. ,'Iherearfendsoflthese rodsare also threadedMandfrhai/ef eigedjherewith fcorrespondingly v threaded sleeves -Pwhichform vshoulders [that .,maybeadjustedinto;differentlpositions; A screwvjP3... engaging the, :rear portion `ofthe sleeve 'P1 and bearingagainst thei rod P'. .ser ve s to lock ment :The rodsgri aiso, passthrough channels .inlthfeederj Pfand. springs P* sleeved on the" 'o5is'shown in v1"igure s '7 and .1i andfcomprisesa rods forward ofthe lfeederIP'. yieldably press said feeder rearwardtoward the limiting stopsformed by the sleeves P@ There? i s ,ho wever, provision forV holdingthefeeder P forwardagainst the tencrankarm Q mounted on a shaft Q"-`.which is journaledina vside. piate1.of the feeder, anda pinion-"Q2 on..theV shaft intermeshes with the sion... The gearwheel-Q3 is up'on ashaft Q4 also Athe pinion will be caused. tjo.tr i."v el}A along therack Q carrying with it the feeder P. If the 'or tneraek Q6.v When'iitis desired to throw the feeder into actionthe `cam Q" is disengagedametercorresponding to that of the stock before @Si to producethereguired amount yof frictionv Thisfis greaterthan the friction of thefeeder movement of the crank is sufiicient the feeder lwill be movedcompletely out of the path ofthe sleeves P2 and may be locked in thisposition by a camV lever Q7 engaging anotchQa in the top from the InotchQa whereupon the tension. of` the springs P4 will return the member `Pto its Lnormal position. The "reciprocation of the rods .P and vslieeves .P2 'lwill then correspondin'glyre- 'ciprocatetheifeeder P.`The crankv handle Q is detachable `from the shaft Q', but the gears Q.

willbeloscillatedduring the reciprocation of the ,feeder, P. 4It issometimes desirable to limit the i :stroke-ofthe feeder P Whichisaccomplished by The intermediate section L';.holds the die'mem'- ber Othrough which the stock is passed to slight; 1y reduce the'diameter'andfinish the surface` afstopfscrewgQ secured to the frame .L at its rearyend and Jadjustable into the path of the feeder.'v l

' The feeder P when thrown into operationmay fbe used forpadvanoing theystock .through the die O and intoengagenent, witnthe forward feeder N.However,- before' this" is done itis'convenient toseparate the jaws ofthe' rear feeder against" s the, closing tension .of ,thelsprlngs Ns sothat the4 stock fniay. be easilyv inserted by hand ithere' tbetweeh.-,f; 'rhis f is' accmpnshed by. ,the'f-nieciianism" illustrated,in ligr'esd, 5 and 6, `a' nd` 'the' same construction maybe applied tobothfthe feedersN and?, but onthev former for 'emerlf'irig a"stubshaft'Rf is mounted'on one of the'side lacam portion Rf contactinglwitha roller R5 on a "sleeve R which latter carries the bushing N9. Thus, byrotating the gear-wheel`1=t` .the rack .bar"'can, bejmfoved into av'position where .the sleeve'Rfwili contact with the rear ends@ offliofthe 33W ,members .N1 movingl them 'forward partsl` intrus" positionjunuithe stock nasjben insertedthrough thefjaws. As shown inFi'gure 2j thisadjustment means is on the front side off the .head N andisprovidedwithl an operating -handl'e` R"''for actuating ther same.v Asimilar 5 mechanism 'is' placed on the back `side. of the member P,being operated bya handle QR.'

'I'he bushingsN'arid N9 forthe feederN may ,the rear end of said plate.rack'bar"'has `35 be` selectedwith respect to, the diameter of stock tobepassedfther'ethmugh, and similar 'bushings if,

are provided forv the feeder P 'which are of 'a diit'passesthrqugnthesihg' uie'o. `stili,amither bushing Sismounted attherear end of theframe and intogoperative'relationto the iawsfofftl'ierear fe`e`der.' P.-,.` During the initial' operation` of mechanism'shownin Figure 3, comprising ashoe S on one side of the stock-'and a cam shoeS. on the` other vside of the stock 4actuated by a.v springjawswhenmoved rearward over the stock so that the latterremains'stationary until the jawsagain grip"r the..same' for A:a Asucceeding ,step forward.

The shoe S2 .is only'left in' this positionzduring the feeding of thestock throughr .the sizing die Oy 75 t L :and the sto'clg ifs first fedthrough. thislbu'sliingg the feeder. P; itl .is necessary to hold 'thestockl '-.froni moving'jrearward when the feeder moves yin thisdirection; This function is performed by the "o after whichthe-frictionof the latter willbesufdcient to hold itfrom rearwardmovement, and

the cam shoe'S2 can be thrown out of action by a handle S4 yforrotatingthesame.-V As soon as .the spring S3 passes thecenter of the -cam, ,i ts

tension will act to hold the Vca rn in this position. It sometimeshappens that ya.l section of vstock ,will bebentorfouled in the machine,and-it is necessary to withdraw -itbefore themachlne can `be .furtheroperated@` .The high Afriction of the portion of the stock whichvis inengagement with the sizing die Q would render it diicult to` withdraw itfrom the diev by hand power..v lIvhave, therefore, provided a meansoflockingv the jaws of the-feederP upon the stock passing therebetween,so `that they will clamp the stock` even. when the feeder is moved in arearward direction.

This locking meanscomprises Screws?5 which threadedly engage the forwardend-ofthe mem? ber P and adapted to be adjusted against theforward end.of the vjaws to forcethe same rearward until they firmly clampthestock. zThis clamping is effected when the feeder P has beenadjustedtoits forward position, as shown in Figure 1, wherethe cam Q'Ilocks it to the rack 4bar Q6. This cam may then be releasedandthecrankrhandle Q erledigen?.v with the shaft Q' and rotated in -the`direction to move the feeder P rearward. Ifthe amount vof movement lisnot sufiicient to completely withdraw the stock from the, die O thescrews P5 may be adjusted to release the jawsy 'while the member P isagain moved forward by the crank handle Q, after which the Lscrews P5are again adjusted to clamp the jaws andthe member Pis again drawnkrearward. 'In

this way fouled stocky can easily beextracted from the machine. When astock bar is fed forward to :the ypoint where itsrear'end disengagesfrom the sizing die O, it will berelieved from the friction of Vthisdie. It then becomes necessary to provdeother means than the friction ofthe die LOto hold` the stock bar from rearward movement v,when theVfeeder N'moves in this direction. Adevice for this purpose is shown inFigures Land 9- and y comprises a ,splity bushingk T arranged forwardofthe feeder andY held in position inthe frame IL by a screw vT. Asecond screw. Tengagingthe split portion of the bushing is revoluble bymeans of a handle VT3 to contract said bushing and to piacethedesiredfriction on .the stock. Thus, the forwardzfeeding of the stockkcancontinue until its rear end disengages from the forward feeder N,after which it is Astill fed forward by 7 4, 5 and 6, so as' to move thejaws of the feeder forward and to permit the same to separatesuiiiciently for the insertion of the end of the stock bar. The handleR9 is then turned into tits normalpositionfwhich permits .the jaws togrip the stock bar and to feed it forward in successive steps. However;the friction device, illustrated-in Figure 3, is adjusted intotheposition shown inV saidiigure where it will hold. the stock bar fromrequired number of reciprocations of the feeder P` feeder... n Y

The atngllpport ofthe .frameA L `by ythe' vPvtfll llink' L4 pernflitsAany, night movementthe stock willbe'advanced into engagement f with thedie oy and tnenforeea through the v latter. The friction, device Sz'can:then-be adjusted into its inoperative position shown in Fig- `ure 3, andthe friction ofthe die O depended upon .for holding the stock againstvrearwardmovement otherl than that permittedvbythe movement ofi`lthefdie'against the stops O". The forward advancementby. vthe rearfederis continued until the forward en'dof` the stockbar which has beensizedlby .the die vOy comes into operative engage-L ment with. theforward vfeeder N. The rear feeder maythen be'thrown out of `,action byadjustment ofthemechanismshown in Figures ljand 7, the

. crank handle' Q l being1 engaged withV the/.shaft Q' fand the latterrevolved totransmit motion tothe pinion Q5l Q ausingz it to` travelforward on the rackj Q6. At the end ofthis movement thercam leverfQFI isengaged withA the notch-Qiwhichwill 20 hold lthe ,feeder P-forwardand-vinfits inoperative DOSitivOn- Thus', While the .forward feedsrNcon-.tinuesto reciprocate and moves vwithit thefrods Pfand sleeves`P2,thelatte'r vdonot come yin convft'act with `the 4member-P.` jAt. .thesame `time the `handle R9 is thrown forward, locking thejjawslof therearchuck open, thus preventingv them from wearing out.

-- When therearend ofy astock bar'passes beryond thedie 0,'.the frictionclamp T shown, in

Ffigure 9 is used to'holdfthe bar from rearward movement duringthersucceedingsteps kof the remove a portion ofythe'stock bar-from` themachineflthis can beaccomplishedfas previously described, b y yadjustingthe fscrews 'P5 yand clamp- .inggthe jaws-of lthe rear feed member P,after j which the crank handle Q Vandmechanism. oper-- ated therebycanbeactuatedto withdrawn the stock vin a rearward direction. The rearVfeeder 'Pjiwhensnot in :usefor advancing the stock lstillperformsthe.function of straightening the rod las it isfdrawn :therethrough bythe-forward thereof occasioned by@ .theI stresses to whichrit issubjectedwhle maintaining`A a rigid lconnection 'with ,the-mainframeor-bedA. 1

j --When the stock is being: advanced by the rear feeder it` is .lnecessarylto :support the portion Ywhich is. between the Vfeeder and thedie, so as to avoidbending or bucklingzof the same. Thisis accomplished:by supporting sleeves or bushings f surrounding-the stock and `as shownin Figure 2,

thereiisxa longsleeve W attached `to the rear wallof the section L andextending forward into vproximity to ythe:A die- O, but leaving sumcientclearance foi-:the floating movement of said die. There isI alsoafshorter bushing W. at rthe forward end of the.V feeder P which'extends into proximity to the forward ends v of the grippingjaws.lThere is,.howev`er, one portion of the stock materially reduce therigidity, but with smaller stock. for instance one-half inch indiameter',

there Amight be dangerv of.. buckling.- Toy avoid Qsuch `objection Lthestroke of .the rear feeder may moving rearward withthe Lfeeder P.`.Afterf the be diminished-asmuch asdesired, by means yof the adjustmentscrew Q9.- This forms a stop u the "amount offflearaiicejcan be' reducedto the desired degree.y When?sucht-adjustment is-eifected, f the steek`"will v be advanced. b`y` Vthe :rear feeder in short steps; sothatitheunsupported portion i will'be relatively `short in lengthi 1 What'Iclaimlas-my inventionjis:

` 1. In a machinevoffthe cha ac frfdescribed,

means Afor advancirigthefstocl; lcomprising a reciprocatory member;stock'grippingf-jaws carf ri`ed1by said member'and having 'awedgeengagement therewith,"'resilientfmeans at one'end "of f saidj jaws for'urging said -jawsA rearward' into said wedge engagement," andfirieans,carried-:by v fsaidi reciprocatory nienibera't the -other I endr of saidjaws for y'moving' 'said jawsforward A and therebetween.`

"ciprocatoryf-niember, stock''gripping' jaws car- "ried'by -saidmemberand'having a-wedg'e erigagef ment'V therewith, resilient meansinad'va'nc'e of )said jaws for urging said jaws-v rearward into saidwedge engagement,"and "meansffor releasing said jaws for the insertionof the stock therebetween comprising a sleeveisurrounding'u the stockyin rear of 'said jaws,an d means on `said 'recpro'catory member for."moving said ,"'sleeve forwarda'gainst said fjaws'." I

3. In a 'machine' of the character described, meansforadvancinglthestocln' comprising a re- `ciprocato'ry member,4 stock'gripping jawsibar- 'nedby said'memb ,and having a wedge engagementtherewith,l resilient means. fori urging said jaws rear-Wardinto'fsaid'lwedge engagement," and A'means for releasing'saidjaws forth'einsertionA r'of the stock therebetween"cniprisinga'sleeve`surrounding the 'stock'in--rear` of lsaid jaws, agear 'wheel' mounteden* said rreciprocatory member,

a'ra'clr'V engaging said gear wheel"Y and"`nfovable thereby transverselyAof' said f member, a `handle for rotating said Vgear-,sand a cani`carried-by 1 'said rack'uopera'tivelyi engaging'fsaid jslee've to f(Inove'the same forwardffagainsti said jaws rocating headhaving'spaceddnclinedjupper and lower portions forming wedge; surfaces,*clamp- 'ing jaws betweensaid wedge surfaces and 'having inclinedportions-'substantially' parallel -to the inclined surfaces f offxthehead, 'i anti-friction means between said lparallel portions Ispringvmeans within 'thehead at oneen'dof `said jaws for moving said .jaws'relative to said wedge surrfaces to operative clamping position,andgmeans carried by said head'at the other end of said jaws fork movingsaid V'jaws relative to said wedge surfaces tofinonerativcv 'positionitc permit' the. easy insertion `of` stocky between saidfjaws. f

5. In amachines of the characterfdescribed,

'me'ansy for advancing stockfcomprisingla recip- -rocating'head havingspaced inclined; upper and lowerA portions forming wedgesurfaces,clamping jaws betweensaid'wedge,surfaces land havinginclinded portions.substantially .parallel-1 :to the inclined surfaces oftheheadaantiefriction means rwithin the head in advance vof said jawsfor/movbetween said parallel "portions, spring means K' 'ingr said jawsrelative to saidwe'dge surfacesf'to of stock between4 saidnjawsincludinga sleeve for stock in"` rear of jsai'dA4 jaws,` and Vmeans carried bysaid head fdr rnovingl saidsleefve against said jaws. "f S11' .w

Y 6;?"In"a machine ofi-the" character described. .5 vmeans for advancing'stock 'comprising' a recipro- Y,

cating head "having spaced inclinedupper and Y' ing? said jaws relativeto said wedge `surfaces to operativeclaxnping position, andmeansffor'fr'xiov.- 15

ing said 'jaws 'relative-to said wedge `'surfaces to inoperativeposition to permit .the-'easy insertion 'of stock Vbetween said j awsincluding-- a 'sleeve'l for andhaving`r a fwedge engagemeht'v-therewith,resilient means'for' urging said'jaws in'to said wedge engagement, andmeans "io'r releasing ,saidV jaws 30 l from said wedge engagement,"including la sleeve engageable with said jaws, ya.- slidable rack having'a cam for'actuating vsaid sleeve, andl a'g'e'ar for actuating saidrack. "ffl f 18. lIn a machinefof theclassfdescribed,"means 35-foradvancingthesto'ck comprising'a reciprocating headystock grippingjaws carried by said head` and having a wedge engagementtherewith',lresil ient means for urging said jawslin-to saidwedge'-ngagement, and means for"relea'sing said jaws v'from' said wedgeengagement,` including slidable1 u "means substantiallyin'axialalignment and en- 'fgageable' with an 'end of |said jaws, andmeans forfactuating' said" slidable l` `means including a"member-slidable'atf'substantially right angles to 45 -said-slidablemeans. l

9;'In agmachineof the classdescribed'rmeans for advancing thestock'comprising `a yreciprocat- :ing' head, vstock grippingj'awscarriedby'-` said head and having a wedge'engagementftherewith. 50'resilient means'.` for urgingsaidjawsvinto`saidi, vfwedge engagement,and means for-releasing saidV "jaws from said wedge engagement,including a'V -gear carried byy said"head,a'l rack r'actuable by saidgear and having'fa cam portion, and a sleeve 55 for; the stockactuableby said cam portio'na'g'ainst 10. In a machine of the `classdesc'irib'edvl stock advancing mechanismV including a reciprocating headhaving Yspaced* inclinedportions. forming 00 wedgesurfaces,work-engaging jaws between said 5,

wedge surfaces and having inclined portions sub-` stantially paralleltothe inclinedsurfaces of the head, .anti-friction means fbetweenpsaidparallel f portions, yieldable means at one lend of the'jaws 65 formcving thejaws relative tothewedge surfaces to operativevclampingposition, and means for-,moving the jaws lagainst the yieldablemeans so-that workmay be inserted'by\hand"therebe tween, including alongitudinally movableV mem- 70 v,ber at thelother, end of, thejaivfvs.-.and means. forfv .moving-said member ltoward ksaid yieldablemeans.

V11. In a machine cf the class described, a stock advancing mechanism.including aireciprocating v headfhaving @spaced inclined iportinsforming 75K.

2,228,748. wedge surfaces, work-engaging jaws between saidwedgesurfacesand having inclined portions substantiallyparallel to' theinclined surfaces ofthe head, anti-frictionl means between `said.parallel portions, yieldabl'e means .at one end of `the jaws for movingthejaws., relative ,tol the wedge .sur-

12. Ina machine of the yclass described', agst'ock advancing`mechanism.. including .a reciprocating head 'having spaced inclinedportions forming wedge surfaces, .work-engaging jaws between said wedgesurfaces and having-inclined;portions sub.`

stantially parallel '..to the inclined f surfaces; of :the head,anti-friction means between., said parallel portions, yieldable meansatone .end ofthe jawsv for moving thejaws relative tothe wedge surfaces.to operative clamping position, .andymean's for moving the'jaws againsttheyeldable means so that work maybe insertedby hand therebetween,Aincluding a bushing for 'the work-at thegother endl of the jaws, and a,sleeve Afor said bushingiengag'eable with said jaws. Y

13. In-a machine of the-class described,.,a stock: advancing .mechanismincluding; awreciprocating head having spaced inclined portionsVforming. wedge surfaces, work-engaging jawsbetween said wedgesurfacesand having inclinedportions `substantially parallel to lthe.inclined Surfaces. of theportions, yieldable means at one endofjthe`jaws for movingthe jaws relative tothewedge surfacesto .operativeclamping position, and ymeans x for moving the ljaws against the.yieldable means so that wor-k may be inserted by hand therebetween,including a tubular work-receiving mem.- ber at the other end therewith.

14. Inarnachine of the class described, a stock advancing mechanism.including. a reciprocating, head having spaced inclined portions formingwedge surfaces,` work-engaging jjaws between said wedgel surfaces andhaving inclined portions subfstantiallyv parallel .tothe inclinedvsurfaces of fthe. head, lanti-'friction. means between. said .parallell portions, yieldable means at one end of thejaws for moving the jaws.relative to thel v vedgef` surfaces to operativeclamping position,andfineans for moving the jaws against the yieldableineans'-v so/ thatworkmay be inserted `by hand therebetween, including abushing forv workat the oth er end of said jaws, a sleeve for said .bushing engage-Y ablewith saidjaws, and actuatingmeansfor the sleeve including alongitudinallyinovable member having a cam' portion,'and a projection'onthe sleevefengagingf said cam portion.V

In a machine of the class described, a stool;` advancing mechanismincluding` a'freoiprocating head having spaced inclined portions formingwedgesurfaces, work-engaging jaws between said wedge surfacesandhavingin'clined portions subvstantiallyparallel to theinclinedlsurfacesof `the head, antifriction means between. said parallelportions, yieldable means at one end of the jaws for moving the jawsrelative to the wedge surf facestooperative clamping position, andmeans*V form'oving the jaws against theyieldable means so v that workmaybe insertedby hand therebetween, including a longitudinally .movabletubuf lai" member at thefrother ,end of 'and' engageablev with thejaws,la`nd actuating means 4for 'the tu'- of said jaws and en gageableju .-1`,6".-'In a machine of th'e'flclass described,":a stockwedgejsurfaces, work-engaging. jaws between4 said wedgefsurfa'cesand/having inclined portions' substantially parallel toA the inclined:surfaces .of

the head, antifriction means between said parallel portions,yieldableImeans -at one end iof'the jaws forv moving the jaws relative to .the.wedge sur` faces tof operative clamping position,v and means'.

bular Ymember including a cani, and a]projeczti'onA on' the tubularmemberengagingsaidcam. f

advancing mechanismfincluding a reciprocating head having.y spacedfinclined" portions forming for movingfthe jaws'again'st the'yieldablemeansv 1 so that work maybe inserted -by 'hand' therebetween, includinga .longitudinallyimovable mem# Vber at `the other end'of-Jandengageablefwith saidjaws,y aprojection on' said .rnember-,acam'emgagin-g the projection; and meansfor moving said 17. In a machine of theclass described, ya. 'stock' head having. spaced inclined portions`farming 2o advancing mechanism including a reciprocating wedgesurfaces, work-engagingV .jaws between said wedge surfaces i. and fhaving inclinedlporf tions Vsubstantially yparallel `to the inclined'surfaces of thehead, antifriction means between Vsaid'parallelportionsl yieldable. means at one end of v the "1jaws for#moving .the jaws relative to...th

rwedgesurfacesto operative. clamping position, 'A

and means for moving 'thev jaws against theyfeldablelmeans'so thatworkmay be inserted -by hand therebetween-.including. a longitudinallymovable'fr'nember at the. with said jaws'..A 1118,' In amachine of theclass described, a stock advancing mechanism including areciprocatin'gheadfh'aving spaced inclined portions forming other end offandsengageablevv wedgeffsurfac'es, work-engaging. jawsv between saidwedge surfaces and having inclined 'portions substantially paralleltothe inclined sur-` faces of the'hea'd, anti'friction'me'ansbetweensaid' par-allelfportions, ryieldable means' at one end of"'.thejawsffor` moving the jaws;` relative to the wedge surfaces tooperativa clamping. position,V

and means for moving the vjaws against the *yield-i able means sothatwo'rk may lne-inserted .by hand therebetween, includinga'lon'gitudinally mol/able` .membe'rattheotherend of said jaws, andmeans fpmving said member'toward'saidfiieldablv 56.'

.means including .a longitudinally movable". rack -havinga camv"portion, a projection-onfth'lon-rl `v I gitudinally movablememberengaging said am portion, and a manually operable gear meshing11,9. In a machine-fof 'thel dass' described, a stock advancingmechanism :including af reciprocating head=having spa'cedfinclinedportions forming wedge .-surfaces, worlgfengagaing jaws between said"wedge 'surfaces 'and having inclined portions." Y

' substantially parallel vtol the inclined surfaces of tliehead,antifriction means b etweensai'd'vpari allel portions,.yieldable meansat fone endo'fthe 'jaws for moving `the'*jawsrelativeI tothewedge fsurfaces4 to operative -clamping position," and' means for moving thejaws'ag-ainstthe yieldable means so that" work may be'inserted byhandtherebetween, l including 'a longitudinally movabiem'ember atthepthefndof said jaws, fand, meansfforA x `nov ing,saidV member toward saidyield,

able ,means including aflongitudinally movable` rackV having a cam.portion andl a notch, anda l projection on the longitudinally movablemein-' Pv ber engageablelwiththe cam portionftornovethe 3 longitudinallymovable member. and engageablei 75 ,vwi'snthe notch 1:0 holdminedposition. r

n Qi; said jaws l .to fhold the work 'gagainst vrearward l 20. In 1 a:machine vof` ztliefclass; described,l recip; rocating r"jaws forfeeding the :workgforwardlyf andy means operable;y during Atheyzinitialoperation,

movement wheny vthe jaws `inolve 4vrearjvvard,iin; cluding- Opposed:ywork-engaging shoes,v .one be.- ing;;adjus`talz le1relative;l tot the;-worky, the. other being a cam,` and.; actuating means ;.for the lcamshoej vincludingaflspringicapable vofl exertingy through -the teamnshoei upon the work4 `axgreater force than, that.A exerted by. the jaws;upon `the workkl, t v` l f advancinggi mechanism .incfludinlgwjareciprocating.

head ":having` .spaced :inclinedportionsl :for-ming" fwedgeftssurfaceapf work-engaging Ljaws Lbetween y l s .aidwedgefsurfacesrandihaving inclinediportions the head, :antifrictongmeansbetween said parsubstantially parallel to the inclinedrsuri'aces ,of

alle1p0rtions, means' for lockingzthe; jaws upon the stock'passingtherebetweentincluding .screws with the, :jaws at one'fendthereof. n

i threadedly engagingv `th'e head1 and "engageable' 22. In a: machine ofthe classjdescribedlza stock advancing*v mechanism including f.lay-reciprocating.

- head -having spaced f inclinedportionsnformingj wedge surfaces,workfengagingijaws between saidwedge surfaces andhavinglinclinedportionsvsubQ 'stantiallyr parallel tothel inclined,surfaces ofl` the thejawsgat ,one; end Athereon.,andtfrneans .sleevedon said screws and'poperable wheny the;

headi 'anti-'frictionalmeana between :said parallel; portions;vvmeansffor lockingxtlie 'jawsupon the' st'ock` passing t-herebetweenincludingl screws threadedly engaging the head and :engageablefz latter-arevreleased for moving-the jaws relative sition.;

Y l 23;' In'amachineifthe` 'advancing mechanismv including1areciprocating head;having-spaced inclined portiensffermingfStantiallylearllel t0. the ixicind Surfaes 91th.@

Wedgasurfaes;work-engaging jaws betw'ensaid* WedeefsllrfaceS-.andhavngfinclinedonortions S1112-,`

head; antnftionffmeans; between' Saidfharallel portionsyeldable, meansateniese@ Of; the-Jaws fer moving the Jaws. relative.. t0:the-,.wedsesub faces to operatiyegclamping, position, andvmeans,

"'- holding, "the bushing position', and 5 a handle'. ,actuated srewl,earl-led byV the fra'm'e and.` engagingI the split 'portion of me'bushing, said last;

. niention'ed'sc'rew .being adapted "toco'ritract thev split portinofrthevbushin'g upon the stock. ,Y 25,.;Ii`1 a' inachinepfthe classdescribed, ,astoclr` advancing mechanism" including af reciprocatinghead having'ffspaced inclined A,pi'crrtions forming Wdg'e ,surfaes".v`wdrkfenga'gng jaws 'between Saifd' wedgesurfaces and shavinglinclinedpc'nitions' subf stantrauy parsing; `to tneineljinedsdirfaesofthev head; antnfrictior; means between'l ssidpara'uei ffrfk 'mbvi'rigthe jaws4 relstivegte ,the5 wedge( sur# rele-S4samenzwering: www we.eee-S@ e also carried byjfthe, ;frame"1 foi yliolzzli'fg*th againstrearward-inovementfwhen the feedingj e 'forrnovingy the jaws against the4yieldable,means so :thatawork vmay be Iinsertediby handltherebe- 26.InA av niaehine' :ofl'the fire-f ciprocating( .j aws; for -feeding Atheworkforwardly.

of: said jaws A toA holdf--thej Work-against rearward 5 movement when;the jaws Vmove rearward, includ-A: g

ingeopposedlwork-engagingshoes,,one;beingsadi y.

cam-:and means for''act'.,uatin'gthe 'cam:shQein--g` v justable relativeto,A the work; the other@ being Vav cluding lineans capable' of aexerting" through the cam-shoeupon the .work :azgreater Afarce. thanthat ekertedbyftheljawsuponlthe work. -:4 15

27.*;'In-amachineof-,theclassdescribedyalstock G,advaneingmechanism.includinga reciprofcatmg;4 head lhaving "spaced.'.inclinedportionsy forming Y lwedgesurfacesQiworlieengagirig.jaws1betweerrsaid' i wedge surfacesa'nd'vhaving inclined-portions sub-'f' stantially parallel tothe inclinedsurfacesof said' ,Y

f headVanti-lfiction meansfbetweenfsaid parallel ,l portions; 'ad'meansfcarriedi'by the 'headand-'enf gageable fwithl one end @of the' jaws 1for Vlocking' thejawszupnf 'the sto'ek'pass'ing therehetweenl 1:23,`lIny a-machineleof the'class described, means s* Y forl'advancing 'the fstock 'including a' reciprocatl ing headhaving wedge fsurfaces, 'stockgripping thestockpana 'resnientfmean's v'carried fb'yt the ,39 f e fwedge surfaces-vinto clamping-#engagement with' headand-bearingyagainstf-one en'd ofthe jaws thetension Yof saidv resilienti-"m'ea'ris'ltot'-f-re'e"liche` v 'reciprocating faces' fOr frnv'ing'` th jawstransversely ofthe lieadffcarryV ng the'. jaws *and having'i wedge lsurof the head, against ori'eeidvof'4r means fniovesl rearwardvl including'"a fr'nember 'oar-,l1 ridbv said frame'forward ofthe feeding nieans; and,adapted tofvbefcontracted ,uponthe stoe ni ntA arried'by the *framefer, holdf adjustablel'ele 5l vand means-.operable duringztherinitial,operationl` so Y tofclarnped positionnagainstf'thej stocktan l. 'an vadjustingslcrew movable jlen'gthwise ofj thej `head of; mateds'wck'clamping jaws, :i reciprocating,

33. In a machine of the class described, a

vframe, a sizing die carried by said frame, means forfeeding stockrelative to thedie, and'rmeans'` also carriedvby` the frame for holdingthe stock against rearward movement When'the feeding means movesrearward, including a member carcluding opposedwork-engaging shoes,'onebeing] i adjustable relativey to the work, and vmeans forl ried bytheframe forward of the'feedin'glmeans and having a portion adapted tobe contracted;v upon the stock, an adjustable element carried bytheframe for holding said member in posi-l vciprocating jaws for feedingthework forwardly,-

and means operable during the initial operation f of said jaws to holdkthe work againstjrearward movement when the jaws move rearward, `in-'actuating the other shoe to exert upon thework a greater force thanAthat'exerted by the jaws thereon. i

35. In a machine of the class described', a die for sizing stock, a.feeder for moving stock relal' tive to said die, and means operable whenthe'l stock is relieved of friction of the dieto hold the .stock fromrearward movement during rearward movement of the feeder, including a'split bushing,

Vandmanually operablemeans for contracting the 1 bushing upon y.thestock;

36. In a machine ofthe class'described, apair of opposed stock clampingjaws, a reciprocating head carrying the jaWsand having wedge surfacesfor moving the jawstransverselyv ofl'the head to clamped positionagainst the stock, and

means threadedly engaging the'head and bearing against-one' end ofthejaws to hold saidj'aws' wedged-.by saidsurfaces againstthe stock.

37. In a machine of theclass described; a pair of opposed stock clampingVjaws,` a reciprocatingA head carrying the -jaws and having wedgesurfaces for moving the jaws transversely of the head to clampedposition against the'stock, 'and' manually operable means adjustablylengaging'the head and engageable with the jaws at one end thereof forholding said jaws wedged by said sur-k .faces against' the stock. i

-38.- In a machine-.of the classv described, a re` ciproeating headhaving transversely opposed longitudinally extendingwedgesurfaces,a'pair of opposed lstock clamping jawscarried by said` headbetween and actuable by, said opposed wedge surfacesto clamped positionagaints the stock, andtwo different means movablelengthwise of the headand bearing against one end'of y the jaws to hold saidjaws'wedgedbyvsaid surfaces against the stock, one of said means beingoperable vto lock the jaws upon the stock.

39. In a machine of the class'described-,mean's for advancing the stockincluding a reciprocating head having opposed 1ongitudinal1y"extendingwedge surfaces, stock gripping jaws carriedA by with the work,v springvmeans urging the jaws into v'engagementwith the lwedge surfaces, vrandmeans foi` moving the' jaws-against'the tension of. the n spring meanstopermit the insertion loi,I y

ment engageable with saidjaws at one endthere-y of, aV roller.carriedbygs'aid element, a. longitudiy nally movable member having-acamp'ortion corrf f tacting saidroller, and manually `operablemeans 1,-'Y

kfor moving saidmember. e

stock, meanscarried by said head: and bearing.,

against Vone end of the jaws to holdsa'id jaws .2 fwedgedbysaidsurfacesagainstthe stock, and f i manually'operablemeansfor movingsaidjaw's ir i against the action yof vsaid'holding means' to 5 separatethe j'aw's for the insertion of 'stock there'. between 4 intoengagementwith the'. wedge surfaces, and;`

manuallyoperable means for'moving'the jaws i against 4thetensionofthejspring means to perf.l .L f mit the insertion of stockbetweentheiaw's, in. 1 cluding a slidable element` engageable Witl1 `said `A l jaws latoneend thereof, a roller carriedbysaid j element, andalongitudinallymovabley member 20 f having acam portion contacting'saidroller.

41.1In'a machine of the classdescribed, a re,-

said wedge surfaces into 'grippingA engagement stock between the jaws,including slidable ele-'r A2. `In a machine of theclass described, re-

withthe" vf{ iyr1' spring means 'urging thefjaws/ into engagementwiththe'wedge surfaces;- means formovingthe' `j'aWS v''g'airistthev tensionof the'` I spring `"means topermit the insertion of stock@ *i v.betweenthe jaws," including a slidable element engageable with said jaws atonejend'thereof, a'-v roller carried.y byl said elemeniza"longitudinally distance in one direction'.

43,; Infai machine of the classdescribed, 'ae- Y, f cipro'cating headlhaving opposed ywedge. surfaces,`

said` wedge surfacesfintogripping engagement .with the work, springmeans 'urging' ther-'jaws into-engagement withthe wedge surfaces,means*` g vfor movinglthe jaws against the tensionj'o'ff the'jworkclamping jaws `between and actuable by springmeans to permit theinsertionof stock be? .tween .the '.jaws, including a' slidable element"engageable with-said jaws at oneend thereof, [a 1 rollercarried'byfsaidjelement,A anda longitudi- 1 vnally`movableimember:having acam portion" f contacting said roller, andjaaguideflbushingfior,v said head between and actuableby saidwedge. Y'surfaces into clamping engagement witirthe` the workcarried'bysaidslidableelement. -fpg a'machin'e of the class described,aref s ciprocating head having opposed wedge' surfaces f work clampingjaws `between and 'ac'stuabieg-by` said wedge surfaces into grippingengagement# with the work, springmeans .urging the .jaws`ciprocatin'ghead having opposedwedge surfaces,v worky clampingjaws-between and actuablelby .'35 ciprocating head having opposed wedgesurfaces, sV 1 f worklclamping jaws 'between-fand actuable by. `.1 saidwedge," surfa`ces` into gripping engagement j i Amovable member.havingacamjportioncontactJ

